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High-Performance Digital PFC + LLC Combo Controller
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The HR1203 is a high-performance controller that integrates an advanced, digital, PFC controller and a half-bridge, LLC resonant controller. The HR1203 requires low input power at no-load or ultra-light load, making it compliant with the Energy Using Product Directive (EuP) Lot 6 and Code of Conduct Version 5 Tier 2 specifications.
The PFC of the HR1203 employs a patented average current control scheme, which can operate both in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) according to the instantaneous condition of the input voltage and output load. The IC exhibits excellent efficiency and high power factor (PF) at light load. The performance of the PFC can be optimized by programming multiple parameters through an I2C GUI. Programming can be completed either by the factory or by the customer referring to a detailed user guide.
The half-bridge LLC resonant converter achieves high efficiency with zero-voltage switching (ZVS). The HR1203 implements an adaptive dead-time adjustment (ADTA) function to guarantee ZVS in different load conditions. Additionally, the HR1203 can prevent the LLC converter from operating in capacitive mode, making it more robust and easier to design.
The HR1203 integrates a high-voltage (HV) current source internally for start-up. When the AC input is removed, the HV current source also functions as an X-cap discharger. Such features are helpful to reduce related devices, thus reduce power consumption at no load.
In order to improve the noise immunity, HR1203 implements multiple programmable digital filters on critical signals.
Full protection features include thermal shutdown, open-loop protection (OLP), over-current protection (OCP), over-voltage protection (OVP), and brown-in/-out protection.
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Features & Benefits
General System Features
- Meets EuP Lot 6 and COC Version 5 Tier 2 Specifications
- HV Current Source for Start-Up
- Smart X-Cap Discharger
- Standard I2C Interface
- 1k EEPROM to Store Parameters
- User-Friendly GUI for Digital PFC
- High Efficiency from Light Load to Full Load by CCM/DCM Multi-Mode Control
- High PF Due to Patented Input Capacitor Current Compensation
- Programmable Filter for Noise Suppression
- Programmable Frequency Jittering
- Programmable Brown-In and Brown-Out
- Programmable Soft Start (SS)
- Cycle-by-Cycle Current Limit
- Open-Loop Protection (OLP)
- 600V High-Side Gate Driver with Integrated Bootstrap Diode and High dV/dt Immunity
- Adaptive Dead-Time Adjustment of HB LLC with Minimum and Maximum Limit
- Burst Mode Switching
- Safe Start-Up in Case of System Fault
- Two-Level Over-Current Protection (OCP)
- Latch Shutdown Protection
- Over-Temperature Protection (OTP)
- Capacitive Mode Protection
EVHR1203-Y-00A Evaluation Kit 240W General-purpose Evaluation Board
The EVHR1203-Y-00A is a general-purpose evaluation board for the HR1203 for 240W PC and ATX power, adapters, all-in-one or gaming power and general AC/DC power supply applications.
The HR1203 integrates a digital PFC controller and a half-bridge resonant controller into a single chip. It uses very low power at no load or ultra-light load, making it compliant with Energy Using Product Directive (EuP)Lot6 and Code of Conduct Version 5 Tier 2 specifications.
The PFC of the HR1203 employs a patented average current control scheme, which can operate in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) according to the instantaneous condition of the input voltage and output load. The IC exhibits excellent efficiency and a high power factor (PF) at light load.
The half-bridge LLC converter achieves high efficiency with zero-voltage switching (ZVS). The HR1203 implements an adaptive dead-time adjustment (ADTA) function so the LLC converter can easily achieve ZVS from heavy load to light load. Additionally, the HR1203 can prevent the LLC converter from operating in capacitive mode, making it more robust and easier to design.
Typically, the EVHR1203-Y-00A is designed for PC and ATX power, adapters and gaming power applications with a 12V, 20A constant voltage output and 240W rated power from 90VAC to 265VAC and 50Hz/60Hz.
The EVHR1203-Y-00A has excellent efficiency and a high power factor for the entire load range. Full protection features include overload protection, short-circuit protection (SCP), over-voltage protection (OVP), and anti-capacitive mode protection. The EVHR1203-Y-00A also meets the Class C standard of IEC61000-3-2 and EN55022 standard.